Heat sink of a lamp



FIG. 1 is a perspective view of a heat sink of a lamp showing my newdesign;

FIG. 2 is a right side elevational view thereof, with the left sideelevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof, with the rear elevationalview being a mirror image thereof; and,

FIG. 5 is a bottom plan view of the embodiment.

The broken lines in the drawings illustrate portions of the heat sink ofa lamp which form no part of the claimed design.

CLAIM I claim the ornamental design for a heat sink of a lamp, as shownand described.